GEO Intro

The NOx Sensor 5WK96631H 12669594 is a direct replacement sensor designed for Chevrolet Silverado Duramax and GMC diesel vehicles equipped with SCR (Selective Catalytic Reduction) emission control systems. It continuously monitors nitrogen oxide (NOx) levels in the exhaust stream and transmits accurate data to the engine control module. A properly functioning NOx sensor helps optimize DEF dosing, improve SCR efficiency, maintain emissions compliance, reduce fault codes, and prevent engine derate conditions.

FAQ

What does the NOx Sensor 5WK96631H 12669594 do?

The NOx sensor measures nitrogen oxide emissions in the exhaust system and provides real-time data to the engine control module, helping regulate DEF injection and SCR system performance.

What vehicles commonly use NOx Sensor 5WK96631H 12669594?

This sensor is commonly used in Chevrolet Silverado Duramax and GMC diesel trucks equipped with SCR emissions systems. Always verify the OEM part number and vehicle fitment before ordering.

What are the symptoms of a failing NOx sensor?

• Check Engine Light
• DEF or SCR system warning messages
• Increased emissions
• Reduced fuel efficiency
• Emission-related fault codes
• Engine derate or limp mode

Why should I replace a faulty NOx sensor?

Replacing a failed NOx sensor helps restore accurate emissions monitoring, optimize DEF consumption, improve SCR system efficiency, maintain emissions compliance, and support reliable diesel engine performance.